Shedav,
You have been in my prayers this week, and wondering if you were going to be able to make the trip. I know you get car sick, but I take my Bible with me and try to read from Matthew for comfort on trips that make me anxious, it might help to take some pepto or imodium to settle down your stomach before going, keep eating snacks on the way there, and make the visit for your grandparents, forget the others, dont even try to explain it, and when they make the comment See? just shrug it off and continue talking to someone other than them. I understand fully about some family members knowing my condition and inviting me for visits, its always me coming to them, never do they come to me, for a day of conversation, or to get out around my comfort zone, same thing, well have kids, as opposed to what? I have two myself. Its just as much a poor excuse on their part as they try to point fingers and lay blame on us, and ignorance.
You will be in my prayers.
Trish